Concrete-reinforce.



A. E. LINDAU. CONCRETE REINPOROE. APPLICATION FILED MAY 13, 1910.

Patented Dec. 30, 1913.

IIIE STATES PAT ALFRED E. LINDAU', OF ST. LOUIS, MISSOURI, ASSIGNOR TO CORRUGATED BAR COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

CONCRETE-REINFORCE.

Specification of Letters Patent.

Patented Dec. 30, 1913.

Application filed May 13, 1910. Serial No. 561,039.

T 0 all whom it may concern:

Be it known that I, ALFRED E. LINDAU, a citizen of the United States, and a resident of the city of St. Louis and State of Missouri, have invented a new and useful Improvemen't in Concrete-Reinforces, of which the following is a specification.

This invention relates to unit frames for reinforcing concrete structures such as floors, beams and the like.

The principal objects of the invention are to facilitate the positioning of the reinforcingmembers preliminary to filling in the concrete, to minimize the risk of having the reinforcing members distorted or unintentionally shifted in relation to each other, to provide for fabricating the unit frame at the factory and shipping it in collapsed condition, thereby assuring the proper assenbling of all reinforcing members for any beams or girders, and to attain certain other advantages hereinafter more fully appearing.

The invention consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawings which form part of this specification and wherein like symbols refer to like parts wherever they occur, Figure 1 is a side elevation of two correlated alining unit frames arranged for two spans; Fig. 2 is a top plan showing two correlated pairs of collapsible unit frames arranged for two spans; Fig. 3 is a top plan of a single collapsible unit frame in opened condition; Fig. 4 is a top plan view of a single collapsible unit frame in collapsed condition; Fig. 5 is a top plan showing two correlated frames arranged for two spans, the arrangement of the correlated ends of the respective frames being different from that shown in Fig. 2; 'Fig. 6 is a fragmentary top plan, on an enlarged scale, showing the arrangement of the correlated ends of the two frames shown in Fig. 2; Fig. 7 is a View similar to Fig. 6 but showing the arrangement .of the correlated ends of the frames shown in Fig. 5; and Fig. 8 is a sect-ion on the line 88 of Fig. 5.

In the drawings, two alining unit frames 1, 2 are illustrated asembedded in a continuous concrete beam which is supported on columns, piers or walls 3 and extending respectively across spans or bays 4, 5. The

frames of each'bay are arranged parallel with each other, their number and location in each bay depending upon the stresses to which the particular bay is subject. The frames of adjacent bays are in substantial alinement with each other. The frame may be of any suitable form. As shown in the drawings, each frame comprises horizontal bottom bars 6 and upper bars 7 which are preferably corrugated or otherwise suitably formed to secure a bond with the concrete. The middle portion of the upper bar 7 is parallel with the lower bar 6 and, at each end of the middle portion, said upper bar 7 inclines upwardly and thence extends horizontally to each end; and the ends of said upper bar extend preferably some distance beyond the ends of the lower bar in order that, when the main portion of the frame is e bedded in one span or bay, said upper end portions will project beyond the supports into the adjoining spans or bays, respectively.

The several unit frames illustrated each comprise side frames embodying the above mentioned bars 6, 7, and said side frames are collapsibly connected together by spacing links 8. These links 8 are pivotally connected to the respective vertical spacing members or distance pieces 9 of each side frame so as to hold the latter in proper spaced relation to each other in the open position of the frame. The distance pieces 9 may be of any desirableconstruction and arrangement but, preferably, they comprise two straps or bars which are formed with oppositely disposed ofiset portions 10 in which the reinforcing bars are seated, (see i Fig. 8,) and said straps or bars 9 are connected by cotter pins 11. The links 8 preferably comprise flat plates which are perforated and fitted over the opposite ends of the distance pieces 9. The opposite end portions 12 of the links 8 are preferably extended on opposite sides of the unit frames, so that they may serve to properly locate the adjacent parallel frames in the position they are to occupy in the structure.

In order to properly positionthe overlapping end portions of the correlated alining frames, the upper end portions of one frame are connected by links 13; These links are pivotally connected preferably to the downwardly projecting end portions 14: of straps 15 which are folded around the bars 7 (see Fig. 8). As shown in Figs. 2 to 4, inclusive,

and also in Fig. 6, this link 13 is connected near its opposite ends to the bars 7. In this case, the bars 7 are spread apart out of alinement with the middle portions thereof which are in vertical alinement with the middle portions of the lower bars 6. The link 18 is provided with two pairs of perforations 16 intermediate its ends to receive clips, wire ties or other suitable securing devices 17 by which the ends of the correlated alining frame are secured to said link 13 in proper spaced relation, as shown in Figs. 2 and 6. The upwardly offset end portions of the upper bars 7 may be readily rocked into the positions in which they are secured to the links 13; and said links 13 are preferably of such length that their ends abut against the ends of the links in the adjacent parallel frames and thereby serve to space said frames with relation to each other, as well as serving to space the correlated ends of .the alined reinforcing frame of two adjoining panels or bays.

As shown in Figs. 5, 7 and 8, the correlated ends of the alining frames are offset alternately in opposite directions instead of spreading the ends of one frame apart and bringing the ends of the opposite frame closer together so as to be located between them.

lVhile unit frames comprising two parallel side frames have been illustrated in the drawings, obviously, a greater number of parallel frames or reinforcing members may be provided in the unit frame construction, and the unit frames may be otherwise modified without departing from my invention. Furthermore, the unit frames may be rigidly constructed instead of being collapsible. Therefore, I do not wish to be limited to the specific construction and arrangement herein set forth.

What I claim is:

V 1. In a collapsible reinforcing frame for concrete construction, two rigid side frames each comprising upper and lower longitudinal members, the upper members having their outer ends co-extensive and projecting beyond the ends of the lower members, transverse members each rigidly connecting an upper member to a lower member, said upper members being substantially parallel to the lower members and all of the members at one end of the frame being bent inwardly and all of the members at the opposite end of the frame being bent outwardly to lie in planes different from those in which the intermediate portions of the frame are arranged, and spacing members pivotally connecting said side frames.

2. In a collapsible reinforcing frame for concrete construction, rigid side frames comprising upper and lower longitudinal members, the upper members having their outer ends co-extensive and projecting beyond the ends of the lower members, transverse members rigidly connecting said upper members to said lower members, and links pivotally mounted on said transverse members of adjacent side frames, said upper members be ing substantially parallel to said lower members and all of the members at one end of the frame being bent to lie in planes different from those in which the members at the opposite end of the frame are arranged,

whereby in assembling one frame with a like'and overlapping frame substantially in longitudinal alinement therewith, the end portions of all of the members will overlap.

3. In a monolithic concrete floor or beam construction comprising adjoining bays whose meeting end portions rest upon common supports, reinforcing unit frames arranged with their middle portions substantially in longitudinal 'alinementand extending across the respective bays between said supports, said unit frames comprising parallel side frames connected by spacing members, said side frames containing top and bottom bars connected by rigid members, the top bars being co-extensive and extending beyond the ends of the bottom bars, the ends of all the members at one end of each unit frame being displaced outwardly from the central portion thereof, and the ends of all the members at the other end of each of said unit frames being displaced inwardly with reference to the central portion thereof, whereby the ends of said alining unit frames are laterally offset in opposite directions, said ends being overlapped over the respective supports and extending on'opposite sides thereof, and a spacing member secured to the correlated bars in said overlapping unit frames. e

4. A plurality of substantially longitudinally alined collapsible reinforcing unit frames for concrete structures, said unit frames each comprising side framesincluding rigidly connected longitudinal members, some of said members being bent at the ends and having their bent end portions offset upwardly, the opposite ends of said side frames being displaced laterally in opposite directions, rigid linkspivotally connecting said side frames together, and adapted to position the same in the con.- crete structure, and a rigid link pivotally connecting the end portions of some mem bers of the side frames of the unit frame at one end thereof, said link being also secured to the like and overlapping end portions of some members of the adjacentunit frame insubstantial alinement therewith.

5. A reinforcing unit frame for concrete structures comprising straight coextensive horizontal reinforcing members, and bent coextensive reinforcing members whose end portions are offset upwardly, the opposite ends of all the members being bent sidewise and laterally displaced in opposite directions, rigid members connecting said bent members to said straight reinforcing members and holding the same in desired relation to each other, spacing members connecting said reinforcing members intermediate their ends, and a spacing member connecting the end portions of the bent reinforcing members, said last mentioned spac 10 ing member being adapted for connection to the like and overlapping end portions of the members of a similar unit frame correlated and substantially alined therewith.

Signed at St. Louis, Mo., this 10th day of May, 1910.

ALFRED E. LINDAU.

Witnesses:

G. A. PENNINGTON, J. B. MEGOWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). 0. 

